Actually it was Bashar that suggested him to Read ErMaC & AbsoluteDestiny's Friendly AMV Guides Lovingly Overhauled Largely by Zarxrax this time. XDBut! As far as resizing calculations from DVD go, use THIS calculator instead:http://ps-auxw.de/cgi-bin/ar-calc.plIf you're doubtful on its usage do ask here. The calculator on org doesn't account for active area I believe, and in fact I think it was removed from more recent versions of the guide (that link Miya posted is from an old and unsupported version of the guide). The current guide just tells to use the AR calculator in avspmod, which I am not sure if it accounts for active area or not, but is a different calculator all the same.

dvd2avi all day every day, until sauce gets made public (don't hold your breath, writing an avs frontend is annoying)

On other tracks, maybe someone should host a copy of ps-auxw's calculator on the site? It's just a perl script. I have a pretty sweet C calculator too but it's in source form and CLI only. Does some other crazier resolutions though.